package com.lky.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lky.reggie.dto.SetmealDto;
import com.lky.reggie.exception.CustomExecption;
import com.lky.reggie.mapper.SetmealMapper;
import com.lky.reggie.pojo.Setmeal;
import com.lky.reggie.pojo.SetmealDish;
import com.lky.reggie.service.SetmalDishService;
import com.lky.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author shkstart
 * @Description
 * @date 2023-01-05-13:49
 */
@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmalDishService setmalDishService;

    /**
     * 新增套餐，同时保存需要保存套餐的菜品的关联关系
     * @param setmealDto
     */

    @Override
    public void saveWithDish(SetmealDto setmealDto) {

        //保存套餐的基本信息，操作setmeal,执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());


        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmalDishService.saveBatch(setmealDishes);
    }

    /**
     * 删除套餐，同时需要删除套餐和菜品的关联数据
     * @param ids
     */
    @Transactional
    @Override
    public void removeWithDish(List<Long> ids) {
        //select count(1) from setmeal where id in (1,2,3) and status=1
        //查询套餐状态，是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if(count>0)
        {
            //如果不能删除，抛出一个业务异常
            throw new CustomExecption("套餐正在售卖中，不能删除");
        }

        //如果可以删除，先删除套餐表在的数据--setmeal
        this.removeByIds(ids);

        //删除关联表中的数据--setmeal-dish
        LambdaQueryWrapper<SetmealDish> queryWrapper1=new LambdaQueryWrapper<>();
        queryWrapper1.in(SetmealDish::getSetmealId,ids);
        setmalDishService.remove(queryWrapper1);

    }
}
